My personal background is actually very unusual for the kind of career I chose. I didn’t meet anyone who had ever done physics in my life. I grew up in the Himalayan forests. My father was a forest conservator, which meant that if I wasn’t in school I was in the forests with him. That has been very largely responsible for my ecological inclinations.

It is often too late by the time the government reacts.

The population explosion is an ecological phenomenon of displacement. Unless we solve that ecological problem of displacing people - to build huge dams, to build motorways, to take away what people need in order to survive - we will keep pumping more and more money into population programs. We will have more and more coercive and violent methods through which women's bodies are treated as experimental grounds for new contraceptives. Yet we will not have a solution to the problem of numbers.

Whatever happens to seed affects the web of life.

I do have fun. Even when I’m fighting I’m enjoying it: I think there’s nothing as exhilarating as protecting that which you find precious.

My travels through physics really are the same urges that make me travel through ecology. They are not really different, except that there is an added dimension of seeing ecological destruction and seeing the very life-support system that makes us survive on this planet being destroyed. That makes me do more than just inquire; it compels me to act and to intervene.

We will either defend the rights of people and the earth, and for that we have to dismantle the rights that corporations have assigned to themselves, or corporations will in the next three decades destroy this planet, in terms of human possibilities.